Question 1

The repeating unit of poly(methyl methacrylate) is shown below. Which one of the following is the monomer used to make poly(methyl methacrylate)?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
A)  A 
B)  B 
C)  C 
D)  D B

Question 2

The repeating unit of a polymer is shown below. This polymer is formed by

Accepted Answer

A)  addition of ethylene. 
B)  addition of trans-2-butene. 
C)  1,2 addition of butadiene. 
D)  1,4 addition of butadiene. 
A)  addition of ethylene. 
B)  addition of trans-2-butene. 
C)  1,2 addition of butadiene. 
D)  1,4 addition of butadiene. D

Question 3

In which type of polymer are the chains packed less tightly together, resulting in lower melting points and a softer texture?

Accepted Answer

A)  isotactic polymers 
B)  syndiotactic polymers 
C)  atactic polymers 
D)  cross-linked polymers 
A)  isotactic polymers 
B)  syndiotactic polymers 
C)  atactic polymers 
D)  cross-linked polymers C

Question 4

Which of the following is (are) condensation polymer(s)? I. polypropylene
II) Teflon
III) nylon

Accepted Answer

A)  Only I 
B)  Only II 
C)  Only III 
D)  Both II and III 
A)  Only I 
B)  Only II 
C)  Only III 
D)  Both II and III

Question 5

What is the purpose of plasticizers?

Accepted Answer

A)  to harden plastics 
B)  to soften plastics 
C)  to initiate polymerizations 
D)  to cross-link polymer chains 
A)  to harden plastics 
B)  to soften plastics 
C)  to initiate polymerizations 
D)  to cross-link polymer chains

Question 6

Identify the monomer(s) needed to make the following polyester.

Accepted Answer

A)  3-hydroxybutanoic acid 
B)  butanedioic acid 
C)  butanedioic acid and ethylene glycol 
D)  butanedioic acid and ethanol 
A)  3-hydroxybutanoic acid 
B)  butanedioic acid 
C)  butanedioic acid and ethylene glycol 
D)  butanedioic acid and ethanol

Question 7

Which monomer and which type of initiator would you use to synthesize the following polymer?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 8

Which of the following initiators can be used for free radical chain-growth polymerization?

Accepted Answer

A)  benzoyl peroxide 
B)  CH3CH2CH2CH2Li 
C)  BF3 
D)  Al(CH2CH3)3, TiCl4 
A)  benzoyl peroxide 
B)  CH3CH2CH2CH2Li 
C)  BF3 
D)  Al(CH2CH3)3, TiCl4

Question 9

Vulcanization is the process of cross-linking polymer chains in rubber using what chemical?

Accepted Answer

A)  sulfur 
B)  formaldehyde 
C)  benzoyl peroxide 
D)  ethylene glycol 
A)  sulfur 
B)  formaldehyde 
C)  benzoyl peroxide 
D)  ethylene glycol

Question 10

Rank the following monomers (X, Y and Z) in order of increasing ability to undergo anionic polymerization, starting with the least reactive monomer.

Accepted Answer

A)  Y < X < Z 
B)  Z < Y < X 
C)  X < Y < Z 
D)  Y < Z < X 
A)  Y < X < Z 
B)  Z < Y < X 
C)  X < Y < Z 
D)  Y < Z < X

Question 11

What is the classification of the following polymer in which X and Y represent repeating units?

Accepted Answer

A)  block copolymer 
B)  homopolymer 
C)  alternating copolymer 
D)  random copolymer 
A)  block copolymer 
B)  homopolymer 
C)  alternating copolymer 
D)  random copolymer

Question 12

The monomer used to make superglue is shown below. Which of the following methods of polymerization is most suitable for this type of monomer?

Accepted Answer

A)  free-radical chain-growth 
B)  cationic chain-growth 
C)  anionic chain-growth 
D)  acid-catalyzed step-growth 
A)  free-radical chain-growth 
B)  cationic chain-growth 
C)  anionic chain-growth 
D)  acid-catalyzed step-growth

Question 13

What modification occurs when a small amount of p-divinylbenzene is added to the polymerization reaction of styrene to form polystyrene? (Recall that the vinyl group is -CH=CH2.)

Accepted Answer

A)  Cross-linking of the polystyrene 
B)  Isotactic stereochemistry of the polystyrene 
C)  Syndiotactic stereochemistry of the polystyrene 
D)  "Softening" of the polystyrene by a plasticizer 
A)  Cross-linking of the polystyrene 
B)  Isotactic stereochemistry of the polystyrene 
C)  Syndiotactic stereochemistry of the polystyrene 
D)  "Softening" of the polystyrene by a plasticizer

Question 14

The acid-catalyzed dimerization of isobutylene gives a mixture of two isomeric alkenes, A and B. Hydrogenation of this mixture gives a single C8H18 hydrocarbon. What is the structure of this hydrocarbon?

Accepted Answer

A)  2,2,4-trimethylpentane 
B)  2,3,4-trimethylpentane 
C)  2,4-dimethylhexane 
D)  2,5-dimethyhexane 
A)  2,2,4-trimethylpentane 
B)  2,3,4-trimethylpentane 
C)  2,4-dimethylhexane 
D)  2,5-dimethyhexane

Question 15

Which of the following is the monomer that gives the polymer shown below?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
A)  A 
B)  B 
C)  C 
D)  D

Question 16

What is the structure of the polymer which results when styrene is reacted with BF3 and H2O?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
A)  A 
B)  B 
C)  C 
D)  D

Question 17

Identify the repeating unit in the polymer formed from the following reaction sequence.

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
A)  A 
B)  B 
C)  C 
D)  D

Question 18

Which one of the following monomers undergoes anionic polymerization most readily?

Accepted Answer

A)  H2C=CH2 
B)  H2C=CHCH3 
C)  H2C=C(CH3)2 
D)  H2C=CHCN 
A)  H2C=CH2 
B)  H2C=CHCH3 
C)  H2C=C(CH3)2 
D)  H2C=CHCN

Question 19

Which of the following sets of products results if nylon 66 is treated with sulfuric acid?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
A)  A 
B)  B 
C)  C 
D)  D

Question 20

What is the name given to polymers with single monomers?

Accepted Answer

A)  homopolymers 
B)  copolymers 
C)  block polymers 
D)  random polymers 
A)  homopolymers 
B)  copolymers 
C)  block polymers 
D)  random polymers

Exam 31: Synthetic Polymers

The repeating unit of poly(methyl methacrylate) is shown below. Which one of the following is the monomer used to make poly(methyl methacrylate)?

The repeating unit of a polymer is shown below. This polymer is formed by

In which type of polymer are the chains packed less tightly together, resulting in lower melting points and a softer texture?

Which of the following is (are) condensation polymer(s)? I. polypropylene II) Teflon III) nylon

What is the purpose of plasticizers?

Identify the monomer(s) needed to make the following polyester.

Which monomer and which type of initiator would you use to synthesize the following polymer?

Which of the following initiators can be used for free radical chain-growth polymerization?

Vulcanization is the process of cross-linking polymer chains in rubber using what chemical?

Rank the following monomers (X, Y and Z) in order of increasing ability to undergo anionic polymerization, starting with the least reactive monomer.

What is the classification of the following polymer in which X and Y represent repeating units?

The monomer used to make superglue is shown below. Which of the following methods of polymerization is most suitable for this type of monomer?

What modification occurs when a small amount of p-divinylbenzene is added to the polymerization reaction of styrene to form polystyrene? (Recall that the vinyl group is -CH=CH2.)

The acid-catalyzed dimerization of isobutylene gives a mixture of two isomeric alkenes, A and B. Hydrogenation of this mixture gives a single C8H18 hydrocarbon. What is the structure of this hydrocarbon?

Which of the following is the monomer that gives the polymer shown below?

What is the structure of the polymer which results when styrene is reacted with BF3 and H2O?

Identify the repeating unit in the polymer formed from the following reaction sequence.

Which one of the following monomers undergoes anionic polymerization most readily?

Which of the following sets of products results if nylon 66 is treated with sulfuric acid?

What is the name given to polymers with single monomers?

Structure and Bonding

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Alkanes

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols, Ethers and Epoxides

Alkenes

Alkynes

Oxidation and Reduction

Mass Spectrometry and Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Radical Reactions

Conjugation, Resonance, and Dienes

Benzene and Aromatic Compounds

Electrophilic Aromatic Substitution

Carboxylic Acids and the Acidity of the O-H Bond

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones Nucleophilic Addition

Carboxylic Acids and Derivatives

Substitution Reactions of Carbonyl Compounds at the Alpha-Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Lipids

Filters

What modification occurs when a small amount of p-divinylbenzene is added to the polymerization reaction of styrene to form polystyrene? (Recall that the vinyl group is -CH=CH₂.)

The acid-catalyzed dimerization of isobutylene gives a mixture of two isomeric alkenes, A and B. Hydrogenation of this mixture gives a single C₈H₁₈ hydrocarbon. What is the structure of this hydrocarbon?

What is the structure of the polymer which results when styrene is reacted with BF₃ and H₂O?